Takes too long to load worlds and in game items/pause menu

On the Nintendo Switch edition of Minecraft, when I play in my own worlds or texture packs or in-game bought worlds, there will come a point in when the game would take long to process in when I mine blocks, open chests, access inventory, and go to pause menu options. I believe this to be an in game glitch or bugs so I hope you will be able to look more into these cases to further improve the gameplay.